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#ifndef DIRECTSHOWCAMERAZOOMCONTROL_H
#define DIRECTSHOWCAMERAZOOMCONTROL_H

#include <QtMultimedia/qcamerazoomcontrol.h>
#include <QtMultimedia/qcamera.h>

QT_BEGIN_NAMESPACE

class DSCameraSession;

class DirectShowCameraZoomControl : public QCameraZoomControl
{
    Q_OBJECT
public:
    DirectShowCameraZoomControl(DSCameraSession *session);

    qreal maximumOpticalZoom() const override;
    qreal maximumDigitalZoom() const override;
    qreal requestedOpticalZoom() const override;
    qreal requestedDigitalZoom() const override;
    qreal currentOpticalZoom() const override;
    qreal currentDigitalZoom() const override;
    void zoomTo(qreal optical, qreal digital) override;

private Q_SLOTS:
    void onStatusChanged(QCamera::Status status);

private:
    DSCameraSession *m_session;
    struct ZoomValues
    {
        long maxZoom;
        long minZoom;
        long stepping;
        long defaultZoom;
        long caps;
    } m_opticalZoom;

    qreal m_currentOpticalZoom;
    qreal m_requestedOpticalZoom;
    qreal m_maxOpticalZoom;

    void updateZoomValues();
    bool opticalZoomToPrivate(qreal value);
};

QT_END_NAMESPACE

#endif // DIRECTSHOWCAMERAZOOMCONTROL_H
